NEIGHBOURHOOD OF VIENNA. 611 
come well within shot. This individual, which was the first 
to appear in September, has now entirely vanished, and has 
in all probability died of some wound received on one of its 
many wanderings. 
Since the end of September more Sea-Hagles have been seen 
on the Danube, frequently three or four of them in a single 
day, but often only one, while they now and then absent 
themselves altogether for several days. Their appearance is 
dependent on several causes, but it is the wild ducks that 
have most to do with their movements, for from morning to 
night the eagles hunt the large flocks up and down, and when 
one district has been cleared out and the persecuted birds 
have shifted down-stream their pursuers also disappear ; and 
when, after a few days, the ducks collect again at their usual 
haunts, their adversaries follow them up, and so it goes on 
backwards and forwards. If, however, a frost comes, the 
eagles are sure to be there, and generally some of those that 
are engaged in the easier pursuit of the waterfowl on the 
smaller streams also come to the Danube. 
The Sea-Eagle passes the night close to the place where it 
has either fished or hunted during the day; and as this shy 
bird almost always cautiously shuns both the Hagle-Owl and 
an exposed bait, and can only be approached at night, I 
devoted my attention to the finding out of its sleeping- 
quarters. 
On the Danube it never roosts among the large auen 
that border the river, but always on the islands or “ haufen” 
as they are called. It is also very critical in the choice 
of its quarters, and, avoiding the interior of woods, almost 
invariably selects the edge of a clump of high trees that faces 
either a meadow, a low copse, or a stagnant arm of the river, 
where there is nothing to impede its flying off even during 
the night. The spot must be sheltered from the wind, and 
the tree high and provided with large branches. In the auen 
2R2 
